Display device, display device correction method, display device manufacturing method, and display device display method

Abstract

A display device correction method includes: obtaining, in advance, first correction data for correcting a luminance signal; performing a first transform including applying an error diffusion method to the first correction data to transform the first correction data into second correction data; performing a second transform including thinning, via a predetermined thinning method, the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data; performing a third transform including interpolation, via a predetermined interpolation method, using pixel data components included in the third correction data, to transform the third correction data into fourth correction data; and correcting the luminance signal using the fourth correction data. In the first transform, based on the predetermined thinning method and interpolation method, the transform is performed such that the second correction data matches the fourth correction data.

The invention claimed is: 
     
       1. A display device correction method for correcting luminance unevenness in a display device including a matrix of pixels each including a light emitting element that emits light in accordance with a luminance signal, the display device correction method comprising:
 obtaining, in advance, first correction data for correcting the luminance signal, the first correction data including correction data components corresponding to the pixels; 
 performing a first transform including applying an error diffusion method to at least one of the correction data components included in the first correction data to transform the first correction data into second correction data including correction data components corresponding to the pixels, the error diffusion method including diffusing an error component of a current correction data component among the at least one of the correction data components to a correction data component corresponding to a neighboring pixel of a pixel corresponding to the current correction data component; 
 performing a second transform including thinning, via a predetermined thinning method, the correction data components included in the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data smaller in data size than the first correction data; 
 performing a third transform including interpolation, via a predetermined interpolation method, using pixel data components included in the third correction data to transform the third correction data into fourth correction data including correction data components corresponding to the pixels; and 
 correcting the luminance signal using the fourth correction data, 
 wherein, in the performing of the first transform, based on the predetermined thinning method and the predetermined interpolation method, the transform is performed such that the second correction data and the fourth correction data match. 
 
     
     
       2. The display device correction method according to  claim 1 , wherein
 at least one of the correction data components included in the second correction data that corresponds to the at least one of the correction data components included in the first correction data is a candidate for removal in the thinning performed in the performing of the second transform, and 
 the error component is a difference between a value of a correction data component included in the first correction data that is a candidate for application of the error diffusion method and a value of a corresponding correction data component included in the fourth correction data. 
 
     
     
       3. The display device correction method according to  claim 1 , wherein
 the predetermined interpolation method is linear interpolation performed for each removed correction data component removed in the performing of the second transform, by using correction data components that correspond to two pixels, the two pixels being in a same row, in the matrix of the pixels, as a target pixel corresponding to a current removed correction data component among the removed correction data components, a first of the two pixels being a pixel that is not a candidate for removal in the thinning that is positioned left of and closest to the target pixel, a second of the two pixels being a pixel that is not a candidate for removal in the thinning that is positioned right of and closest to the target pixel. 
 
     
     
       4. The display device correction method according to  claim 1 , wherein
 the predetermined thinning method is a method of removing correction data components corresponding to pixels in a predetermined column in the matrix of the pixels. 
 
     
     
       5. The display device correction method according to  claim 4 , wherein
 the predetermined column comprises even-numbered columns in the matrix. 
 
     
     
       6. A display device manufacturing method for manufacturing a display device including a matrix of pixels each including a light emitting element that emits light in accordance with a luminance signal, the display device manufacturing method comprising:
 obtaining, in advance, first correction data for correcting the luminance signal, the first correction data including correction data components corresponding to the pixels; 
 performing a first transform including applying an error diffusion method to at least one of the correction data components included in the first correction data to transform the first correction data into second correction data including correction data components corresponding to the pixels, the error diffusion method including diffusing an error component of a current correction data component among the at least one of the correction data components to a correction data component corresponding to a neighboring pixel of a pixel corresponding to the current correction data component; 
 performing a second transform including thinning, via a predetermined thinning method, the correction data components included in the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data smaller in data size than the first correction data; and 
 storing the third correction data in memory included in the display device, 
 wherein fourth correction data is derived by interpolation, via a predetermined interpolation method, performed on the third correction data, using pixel data components included in the third correction data, and in the performing of the first transform, the transform is performed based on the predetermined thinning method and the predetermined interpolation method such that the second correction data and the fourth correction data match. 
 
     
     
       7. A display device display method for a display device including a matrix of pixels each including a light emitting element that emits light in accordance with a luminance signal, the display device display method comprising:
 performing a third transform including interpolation, via a predetermined interpolation method, using pixel data components included in third correction data to transform the third correction data into fourth correction data including correction data components corresponding to the pixels, the third correction data being derived by (i) obtaining, in advance, first correction data for correcting the luminance signal, the first correction data including correction data components corresponding to the pixels, (ii) performing a first transform including applying an error diffusion method to at least one of the correction data components included in the first correction data to transform the first correction data into second correction data including correction data components corresponding to the pixels, the error diffusion method including diffusing an error component of a current correction data component among the at least one of the correction data components to a correction data component corresponding to a neighboring pixel of a pixel corresponding to the current correction data component, and (ii) performing a second transform including thinning, via a predetermined thinning method, the correction data components included in the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data smaller in data size than the first correction data; and 
 correcting the luminance signal using the fourth correction data, 
 wherein, in the performing of the first transform, based on the predetermined thinning method and the predetermined interpolation method, the transform is performed such that the second correction data and the fourth correction data match. 
 
     
     
       8. A display device including a matrix of pixels each including a light emitting element that emits light in accordance with a luminance signal, the display device comprising:
 an error diffusion unit configured to apply an error diffusion method to at least one of correction data components that are included in first correction data and correspond to the pixels, to transform the first correction data into second correction data including correction data components corresponding to the pixels, the error diffusion method including diffusing an error component of a current correction data component among the at least one of the correction data components to a correction data component corresponding to a neighboring pixel of a pixel corresponding to the current correction data component, the first correction data being for correcting the luminance signal; 
 a thinning unit configured to thin, via a predetermined thinning method, the correction data components included in the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data smaller in data size than the first correction data; 
 an interpolation unit configured to perform interpolation, via a predetermined interpolation method, using pixel data components included in the third correction data to transform the third correction data into fourth correction data including correction data components corresponding to the pixels; and 
 a luminance signal correction unit configured to correct the luminance signal using the fourth correction data, 
 wherein the error diffusion unit is configured to transform the first correction data into the second correction data based on the predetermined thinning method and the predetermined interpolation method such that the second correction data and the fourth correction data match. 
 
     
     
       9. A display device including a matrix of pixels each including a light emitting element that emits light in accordance with a luminance signal, the display device comprising:
 an interpolation unit configured to perform interpolation, via a predetermined interpolation method, using pixel data components included in third correction data to transform the third correction data into fourth correction data including correction data components corresponding to the pixels, the third correction data being derived by (i) obtaining, in advance, first correction data for correcting the luminance signal, the first correction data including correction data components corresponding to the pixels, (ii) performing a first transform including applying an error diffusion method to at least one of the correction data components included in the first correction data to transform the first correction data into second correction data including correction data components corresponding to the pixels, the error diffusion method including diffusing an error component of a current correction data component among the at least one of the correction data components to a correction data component corresponding to a neighboring pixel of a pixel corresponding to the current correction data component, and (ii) performing a second transform including thinning, via a predetermined thinning method, the correction data components included in the second correction data by removing at least one but not all of the correction data components to transform the second correction data into third correction data smaller in data size than the first correction data; and 
 a luminance signal correction unit configured to correct the luminance signal using the fourth correction data, 
 wherein, in the performing of the first transform, based on the predetermined thinning method and the predetermined interpolation method, the transform is performed such that the second correction data and the fourth correction data match.